package com.example.demo.util;

import lombok.extern.slf4j.Slf4j;

import java.io.Serializable;
import java.util.List;


/**
 * ajax请求返回Json格式数据的封装
 */
@Slf4j
public class AjaxJson implements Serializable{

    private static final long serialVersionUID = 1L;	    // 序列化版本号

    private static final int CODE_SUCCESS = 200;			// 成功状态码
    private static final int CODE_ERROR = 500;			    // 错误状态码
    private static final int CODE_WARNING = 501;			// 警告状态码
    private static final int CODE_NOT_JUR = 403;			// 无权限状态码
    private static final int CODE_NOT_LOGIN = 401;		    // 未登录状态码
    private static final int CODE_INVALID_REQUEST = 400;	// 无效请求状态码

    private static final String MSG_SUCCESS = "Success";
    private static final String MSG_ERROR = "Failure";

    private int code;       // 状态码
    private String msg; 	// 描述信息
    public Object data;     // 携带对象


    public AjaxJson setCode(int code) {
        this.code = code;
        return this;
    }

    public int getCode() {
        return this.code;
    }

    /**
     * 给msg赋值，连缀风格
     */
    public AjaxJson setMsg(String msg) {
        this.msg = msg;
        return this;
    }

    public String getMsg() {
        return this.msg;
    }

    /**
     * 给data赋值，连缀风格
     */
    public AjaxJson setData(Object data) {
        this.data = data;
        return this;
    }

    /**
     * 将data还原为指定类型并返回
     */
    @SuppressWarnings("unchecked")
    public <T> T getData(Class<T> clazz) {
        return (T) this.data;
    }

    // ============================  构建  ==================================

    public AjaxJson(int code, String msg, Object data) {
        this.code = code;
        this.msg = msg;
        this.data = data;
    }

    // 返回成功
    public static AjaxJson getSuccess() {
        return new AjaxJson(CODE_SUCCESS, MSG_SUCCESS, null);
    }
    public static AjaxJson getSuccess(String msg) {
        return new AjaxJson(CODE_SUCCESS, msg, null);
    }
    public static AjaxJson getSuccess(String msg, Object data) {
        return new AjaxJson(CODE_SUCCESS, msg, data);
    }
    public static AjaxJson getSuccessData(Object data) {
        return new AjaxJson(CODE_SUCCESS, MSG_SUCCESS, data);
    }
    public static AjaxJson getSuccessArray(Object... data) {
        return new AjaxJson(CODE_SUCCESS, MSG_SUCCESS, data);
    }

    // 返回失败
    public static AjaxJson getError() {
        return new AjaxJson(CODE_ERROR, MSG_ERROR, null);
    }
    public static AjaxJson getError(String msg) {
        return new AjaxJson(CODE_ERROR, msg, null);
    }

    // 返回警告
    public static AjaxJson getWarning() {
        return new AjaxJson(CODE_ERROR, "Warning", null);
    }
    public static AjaxJson getWarning(String msg) {
        return new AjaxJson(CODE_WARNING, msg, null);
    }

    // 返回未登录
    public static AjaxJson getNotLogin() {
        return new AjaxJson(CODE_NOT_LOGIN, "未登录, 请确认", null);
    }
    public static AjaxJson getNotLogin(String msg) {
        return new AjaxJson(CODE_NOT_LOGIN, msg, null);
    }

    // 返回没有权限的
    public static AjaxJson getNotJur() {
        return new AjaxJson(CODE_NOT_JUR, "权限不足, 请确认", null);
    }
    public static AjaxJson getNotJur(String msg) {
        return new AjaxJson(CODE_NOT_JUR, msg, null);
    }

    // 返回一个自定义状态码的
    public static AjaxJson get(int code, String msg){
        return new AjaxJson(code, msg, null);
    }

    // 返回，根据受影响行数的(大于0=ok，小于0=error)
    public static AjaxJson getByLine(int line){
        if(line > 0){
            return getSuccess(MSG_SUCCESS, line);
        }
        return getError(MSG_ERROR).setData(line);
    }

    // 返回，根据布尔值来确定最终结果的  (true=ok，false=error)
    public static AjaxJson getByBoolean(boolean b){
        return b ? getSuccess(MSG_SUCCESS) : getError(MSG_ERROR);
    }

    /* (non-Javadoc)
     * @see java.lang.Object#toString()
     */
    @SuppressWarnings("rawtypes")
    @Override
    public String toString() {
        String data_string = null;
        if(data == null){

        } else if(data instanceof List){
            data_string = "List(length=" + ((List)data).size() + ")";
        } else {
            data_string = data.toString();
        }
        return "{"
                + "\"code\": " + this.getCode()
                + ", \"msg\": \"" + this.getMsg() + "\""
                + ", \"data\": " + data_string
                + "}";
    }





}


